Shimano Di2 Hardware
Technology
Comprised of small junctions, wires, batteries, and mechanical units, Shimano Di2 looks and feels like a simple system, but it's packed with intricate functions and leading-edge technology. The Di2 platform is complex with many important pieces that must work seamlessly together to achieve Shimano's hallmark precise shift action.
Mechanical units - The small Di2 mechanical units in the front and rear derailleurs precisely control the movement of each derailleur to provide a perfect, crisp shift every time. The powerful, lightweight motors deliver faster and more reliable shifting in all conditions and all terrain.
![DURA-ACE_R9250_Di2_image](/content/dam/productsite/shimano/external-page/technology_description/components/di2/img/DURA-ACE_R9250_Di2_image.png)
Di2 Battery: Di2 was first introduced with an externally mounted battery. But soon afterwards updates included an internal battery option that tucks away inside a bike frame or seat post for convenience and a sleek look. The lightweight, lithium-ion Di2 battery delivers exceptional battery life for less frequent charging; ranging from weeks to months depending on riding habits.
![bike](/content/dam/productsite/shimano/external-page/technology_description/components/di2/img/di2_bike.png)
![dfly](/content/dam/productsite/shimano/external-page/technology_description/components/di2/img/di2_dfly.png)
D-FLY: Shimano D-FLY is the bridge between Di2 hardware and software technology. They enable connectivity between Di2 systems and ANT+/Bluetooth®LE compatible accessories like cycling GPS computers and lights. They also create a wireless connection with Shimano's E-TUBE PROJECT Cyclist for smartphones and so riders can customize shifter setup, check for firmware updates, and troubleshoot any component issues.
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Shimano Di2 Software Technology
E-TUBE
With the fastest, most advanced electronic shifting system in cycling, Shimano Di2 delivers unparalleled shifting performance at industry-leading speeds. And just as each component of the Di2 platform has transformed and improved over the years, so too has the software, the brains behind Di2.
![platform](/content/dam/productsite/shimano/external-page/technology_description/components/di2/img/di2_platform.png)
The initial Di2 software that paved the way for the connectivity and capabilities of today came in 2010 with the introduction of the E-TUBE platform. Delivering an open system to improve the user experience, E-TUBE increased capabilities and put the control into the rider’s hands. Offering options to update, customize, and troubleshoot hardware, E-TUBE created a user-friendly experience to round out the Di2 system.
Now, the E-TUBE PROJECT software offers a wide range of customization and control at your fingertips thanks to the intuitive E-TUBE PROJECT Cyclist for iOS and Android smartphones. Riders can easily connect their bike to the app via a D-FLY Wireless Unit and quickly check for firmware updates, troubleshoot any component issues, connect to compatible Bluetooth® accessories, and customize their Di2 shifting experience with the swipe of a finger.
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